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If the equation $4 x^2+h x y+y^2=0$ represent coincident lines, then ' $h$ ' is equal to
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2751 Upvotes
Verified Answer
The correct answer is:
4
Since the equation $4 x^2+h x y+y^2=0$ represents the coincident lines, then
$$
\begin{aligned}
\left(\frac{h}{2}\right)^2-4 & \times 1=0 \\
\Rightarrow h & =-4,4
\end{aligned}
$$
Hence, option (4) is correct.
$$
\begin{aligned}
\left(\frac{h}{2}\right)^2-4 & \times 1=0 \\
\Rightarrow h & =-4,4
\end{aligned}
$$
Hence, option (4) is correct.
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